CM20 2-1/2" Styrofoam Insulation 2' x 8' R12.5

Cladmate CM20 insulation is a extruded polystyrene foam board / sheet that helps reduce thermal bridging in walls and attics. Easy to handle, cut and install. Above and below grade, under slab, interior and exterior use.

2-1/2" thick sheets are R12.5 rated. The R-value for insulation measures how well insulation materials can resist heat - the higher the R-value, the greater the insulation performance.